import random
from  django import forms
from django.core.validators import RegexValidator
from django.core.exceptions import  ValidationError
from django.conf import settings

from django_redis import get_redis_connection

from web import models
from web.forms.bootstrap import BootStrapForm
from Utils.tencent.sms import send_sms_single
from Utils import encrypt





class RegisterModelForm(BootStrapForm,forms.ModelForm):
    mobile_phone = forms.CharField(label='手机号',validators=[RegexValidator(r'^(1[3|4|5|6|7|8|9])\d{9}$','手机号格式错误'),])
    password = forms.CharField(
        label='密码',
        min_length=8,
        max_length=64,
        error_messages={
            'min_length': "密码长度不能小于8个字符",
            'max_length': "密码长度不能大于64个字符"
        },
        widget=forms.PasswordInput())
    confirm_password = forms.CharField(
        label='重复密码',
        min_length=8,
        max_length=64,
        error_messages={
            'min_length': "重复密码长度不能小于8个字符",
            'max_length': "重复密码长度不能大于64个字符"
        },
        widget=forms.PasswordInput())
    code = forms.CharField(label='验证码')
    class Meta:
        model = models.UserInfo
        fields = ['username','email','password','confirm_password','mobile_phone','code']
    # def __init__(self,*args,**kwargs):
    #     super().__init__(*args,**kwargs)
    #     for name, field in self.fields.items():
    #         field.widget.attrs['class'] = ' form-control'
    #         field.widget.attrs['placeholder']='请输入%s' % (field.label)
    def clean_username(self):
        username = self.cleaned_data['username']
        exists =models.UserInfo.objects.filter(username=username).exists()
        if exists:
            raise ValidationError('用户名已存在')
        return username
    def clean_email(self):
        email = self.cleaned_data['email']
        exists = models.UserInfo.objects.filter(email=email).exists()
        if exists:
            raise ValidationError('邮箱已存在')
        return email
    def clean_password(self):
        pwd = self.cleaned_data['password']
        #加密  返回
        return encrypt.md5(pwd)
    def clean_confirm_password(self):
        pwd = self.cleaned_data['password']
        confirm_pwd =encrypt.md5(self.cleaned_data['confirm_password'])
        if pwd != confirm_pwd:
            raise ValidationError('两次密码不一致')
        return confirm_pwd
    def clean_mobile_phone(self):
        mobile_phone = self.cleaned_data['mobile_phone']
        exists = models.UserInfo.objects.filter(mobile_phone=mobile_phone).exists()
        if exists:
            raise ValidationError('手机号已注册')
        return mobile_phone
    def clean_code(self):
        code = self.cleaned_data['code']
        # mobile_phone = self.cleaned_data['mobile_phone']
        # mobile_phone = self.cleaned_data['mobile_phone']
        mobile_phone = self.cleaned_data.get('mobile_phone')
        if not mobile_phone:
            return code

        conn = get_redis_connection()
        redis_code = conn.get(mobile_phone)
        if not redis_code:
            raise ValidationError('验证码失效或未发送，请重新发送')
        redis_str_code = redis_code.decode('utf-8')
        if code.strip() != redis_str_code:
            raise ValidationError('验证码错误，请重新输入')
        return code





class SendSmsForm(forms.Form):
    mobile_phone = forms.CharField(label='手机号',validators=[RegexValidator(r'^(1[3|4|5|6|7|8|9])\d{9}$','手机号格式错误'),])
    def __init__(self,request,*args,**kwargs):
        super().__init__(*args, **kwargs)
        # super().__init__(*args, **kwargs)
        self.request = request

    def clean_mobile_phone(self):
        """手机号校验的钩子"""
        # mobile_phone = self.cleaned_mobile_phone['mobile_phone']
        mobile_phone = self.cleaned_data['mobile_phone']

        #判断 短信模板是否有问题
        tpl = self.request.GET.get('tpl')
        template_id = settings.TENCENT_SMS_TEMPLATE.get(tpl)
        if not template_id:
            raise ValidationError('模板错误')

        #校验数据库中是否已有手机号
        exists = models.UserInfo.objects.filter(mobile_phone=mobile_phone)
        if tpl =='login':
            if not exists:
                raise ValidationError('手机号不存在')
        else:
            if exists:
                raise ValidationError('手机号已存在')

        #发短信 & 写redis
        code = random.randrange(1000,9999)
        sms = send_sms_single(mobile_phone,template_id,[code, ])
        if sms['result'] != 0:
            raise ValidationError('短信发送失败,{}'.format(sms['errmsg']))
        #  验证码写入redis中
        conn = get_redis_connection()
        conn.set(mobile_phone,code,ex=60)

        return mobile_phone

class LoginSMSForm(BootStrapForm,forms.Form):
    mobile_phone = forms.CharField(label='手机号',validators=[RegexValidator(r'^(1[3|4|5|6|7|8|9])\d{9}$','手机号格式错误')])
    code = forms.CharField(
        label='验证码',
        widget=forms.TextInput())

    def clean_mobile_phone(self):
        mobile_phone = self.cleaned_data.get('mobile_phone')
        user_object = models.UserInfo.objects.filter(mobile_phone=mobile_phone).first()
        if not user_object:
            raise ValidationError('手机号不存在')
        return user_object
    def clean_code(self):
        code = self.cleaned_data.get('code')
        user_object = self.cleaned_data.get('mobile_phone')
        #手机号不存在则验证码无需校验
        if not user_object:
            return code
        conn = get_redis_connection()
        redis_code = conn.get(user_object.mobile_phone)
        if not redis_code:
            raise ValidationError('验证码失效或未发送，请重新发送')
        redis_str_code = redis_code.decode('utf-8')
        if code.strip() != redis_str_code.strip():
            raise ValidationError("验证码错误，请重新输入")
        return code


class LoginForm(BootStrapForm,forms.Form):

    username = forms.CharField(label='邮箱或手机号')
    password = forms.CharField(label='密码',widget=forms.PasswordInput(render_value=True))
    code = forms.CharField(label='图片验证码')
    def __init__(self,request,*args,**kwargs):
        super().__init__(*args,**kwargs)
        self.request = request

    def clean_password(self):
        pwd = self.cleaned_data['password']
        # 加密 & 返回
        return encrypt.md5(pwd)
    def clean_code(self):
        """钩子 图片验证码是否正确"""
        #读取用户输入的验证码
        code = self.cleaned_data.get('code')
        session_code = self.request.session.get('image_code')
        if not session_code:
            raise ValidationError('验证码已过期，请重新获取')
        if code.strip().upper() != session_code.strip().upper():
            raise ValidationError('验证码输入错误')
        return code




